Monday, February 13th 2012

Radeon HD 7770 Specifications Confirmed in GPU-Z Screenshot

Much like a previous exposé with Radeon HD 7950, the specifications of Radeon HD 7770 that were rumored in our previous article have been confirmed by users. It confirms several specifications, starting from the stream processor count of 640, to the 128-bit wide GDDR5 memory interface. The GPU has an out of the box core clock speed of 1.00 GHz, it could be possible that this is a factory-overclocked card, if not, the core clock speed rumor sparked off by the Verdetrol marketing campaign are true, after all.

Source: DonanimHaber
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45 Comments on Radeon HD 7770 Specifications Confirmed in GPU-Z Screenshot

#1
natr0n
It looks to be worse than a 5770 or I am wrong?
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#2
jpierce55
by: btarunr
Much like a previous exposé with Radeon HD 7950, the specifications of Radeon HD 7770 that were rumored in our previous article have been confirmed by users. It confirms several specifications, starting from the stream processor count of 640, to the 128-bit wide GDDR5 memory interface. The GPU has an out of the box core clock speed of 1.00 GHz, it could be possible that this is a factory-overclocked card, if not, the core clock speed rumor sparked off by the Verdetrol marketing campaign are true, after all.

http://www.techpowerup.com/img/12-02-13/91a_thm.jpg

Source: DonanimHaber
Interesting, it does not sound all that promising in performance considering no improvement in memory performance, less shaders than a 5770, and most likely a larger price
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#3
brandonwh64
Addicted to Bacon and StarCrunches!!!
Almost looks to be a downgrade?

5770:


7770:
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#4
jpierce55
by: brandonwh64
Almost looks to be a downgrade?

5770:
http://www.geeks3d.com/public/jegx/200910/radeon-hd-5770-gpuz.jpg

7770:
http://www.techpowerup.com/img/12-02-13/91a.jpg
I show 80gb bandwidth on my 5770, and I am sure that is from the oc.... like the shot you just posted, yet I do wonder on the downgrade. I DOUBT the higher clock and improved architecture will permit much increase over the old cards considering the shader loss. Especially considering it will probably come with a higher price tag. The power consumption would be nice, but with that concern a 7750 is a much better idea. This cards sounds like a fail :mad:.
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#5
Andrei23
unless this will clock to 1500mhz on the core with ease, I would avoid this like herpes
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#6
blibba
Perhaps this card is a tacit recognition that this is all the performance most gamers need, so they're delivering said performance at the lowest possible power consumption and price.

Also, fill rates in GPU-Z put it ahead of the 5770.
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#7
meirb111
transistors count is up almost 50%

the only thing they increased is transistors count almost 50%
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#8
afw
Will perform less than a 5770/6770 IMO ... dont know y AMD is doing this ... :shadedshu
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#9
Crap Daddy
It's a side effect of the verdetroll.
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#10
Cheeseball
Since this HD 7770 is using VLIW4-technology compared to the HD 5770/6770's older VLIW5, I'm thinking it will probably perform the same with that amount of shaders. Hopefully the price is similar or lower.
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#11
WaroDaBeast
by: Cheeseball
Since this HD 7770 is using VLIW4-technology compared to the HD 5770/6770's older VLIW5, I'm thinking it will probably perform the same with that amount of shaders. Hopefully the price is similar or lower.
Damn, I had completely forgotten about that difference in architecture. Yeah, it should perform about the same then.
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#12
sergionography
by: afw
Will perform less than a 5770/6770 IMO ... dont know y AMD is doing this ... :shadedshu
not really, if anything this will perform equal to 6770 and 5770 but with better power consumption and a smaller die size(cheaper)
this will have 640 GCN cores while 6770 and 5770 used the old vliw5 which had 10cu's aswell(except vliw5 has 80 stream processors per cu totaling 800 while vliw4 and gcn has 64 yet perform better than the vliw5's 80)
add to that the 28nm node which will allow higher frequencies then you are talking well over 20% performance boast at stock, and well under 100watt tdp (5770 if im not mistaken was in the 150watt range)
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#13
Cheeseball
Yup, remember that the HD 5850 has 1440 shaders, but a HD 6870 that has 1120 shaders performs just about the same due to newer VLIW4 architecture.
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#14
sergionography
by: Cheeseball
Yup, remember that the HD 5850 has 1440 shaders, but a HD 6870 that has 1120 shaders performs just about the same due to newer VLIW4 architecture.
the 6870 used vliw5 aswell, but had rearranged units in it, like updated tesselation units and rops and what not, it was pretty much a conservative way to get as much performance as possible

and due to the smaller die and less heat output they were able to clock it higher therefore matching 5850 or better

vliw4 was only used in the 6900 series and was about 20% faster than vliw5 since the cu's were reduced to 64cores compared to the 80 in vliw5 yet performed the same
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#15
meirb111
by: sergionography
not really, if anything this will perform equal to 6770 and 5770 but with better power consumption and a smaller die size(cheaper)
this will have 640 GCN cores while 6770 and 5770 used the old vliw5 which had 10cu's aswell(except vliw5 has 80 stream processors per cu totaling 800 while vliw4 and gcn has 64 yet perform better than the vliw5's 80)
add to that the 28nm node which will allow higher frequencies then you are talking well over 20% performance boast at stock, and well under 100watt tdp (5770 if im not mistaken was in the 150watt range)
cheaper die size yet price will be a higher power counsumption isnt a big plus for most people for home pc's they look at price /preformance its not a "win win" its win some lose some.
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#16
crazyeyesreaper
Chief Broken Rig
eitherway dosent matter performance of the 7770 = 5830 / 6790
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#17
NdMk2o1o
by: Cheeseball
Since this HD 7770 is using VLIW4-technology compared to the HD 5770/6770's older VLIW5, I'm thinking it will probably perform the same with that amount of shaders. Hopefully the price is similar or lower.
It needs to be beating it by a good margin if it is to remain at the same price of a 6770' as they pulled the same bullshit with 6770>5770 and kept the same performance at the same cost over 2 generations, so all they have done is given us 5770 performance, no more now less over 3 gens whilst keeping the cost the same over the generations.
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#18
_JP_
by: brandonwh64
Almost looks to be a downgrade?

5770:
http://www.geeks3d.com/public/jegx/200910/radeon-hd-5770-gpuz.jpg

7770:
http://www.techpowerup.com/img/12-02-13/91a.jpg
Your card is overclocked. That is not a real world scenario, and not a good comparison because the 7770 is at stock. Allow me:



The 7770 has higher fill rates, from the start, and will OC beyond that. Consumes less energy while doing so. But, on the other hand, has less vRAM bandwidth, which might impact performance at higher resolutions and/or lower performance with games that load high-res textures, comapred to the 5770/6770. At stock, the 7770 might be better than the 5770/6770 but not enough to justify the replacement (considering it's release price), unless one is really in the need of reducing his electrical bills. That being said, I will not replace my 5770 for one of these.
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#19
Completely Bonkers
Something doesn't computer. VLIW4 uses fewer transistors than VLIW5 per shader. Therefore, with VLIW4 and fewer shaders, transistor count should have gone down by 30% not up by 50%. So there is something else going on here > either the data is incorrect, or the architecture supporting those shaders is radically different, or, even though the die tranny count is up 50%, active transistors are lower, due to locked/disabled shaders/pipeline.

How confusing. Eagerly awaiting w1z benchmarks esp. performance/watt.
Posted on Reply
#20
Zen_
The capabilities of graphics core next in the future are a lot more interesting to me than ever faster acceleration of old games and console ports. That has to be considered in the total value of the product when reviews hit and the outright graphics performance will not likely be that impressive compared to 68xx cards.
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#21
Supercrit
Now AMD uses x7xx for low/mid range cards? what the hell.
Even it would be faster than 5770, and takes less power, what price it will be? I got a 5770 2 years ago used for $100 and now a frigging 6770 still costs $120+, this card will probably cost higher than that. I missed the 4850 days.

The naming scheme is really getting out of control. 7770 still wouldn't beat a 5850, shame on you AMD, should of called it 7570
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#22
btarunr
Editor & Senior Moderator
Cape Verde uses Graphics CoreNext, not VLIW4.
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#23
Crap Daddy
Is it right that it's gonna be priced at 180$?
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#24
Casecutter
by: btarunr
Cape Verde uses Graphics CoreNext, not VLIW4.
Exactly, we will need to wait and see. Something tells me the 7750 might be like a 6790-6850 and no 6-pin, while a 7770 is close to the 6870 though only 85-90W.

Pricing is a different issue as we can't disregard the TSMC pricing increase for 28Nm that might be a factor of 15-20%; even Nvidia will be passing along whenever they arrive. Right now it sound like sticker shock that AMD is only advertising, but Nvidia is not immune and their day will come... At which point it will be easier to swallow their increase as AMD has paved the way.

MSRP on the 6870 was $230 the going rate today is $160 –AR; add 15-20% to $160 and you’re at $185-195, or the under $200 MSRP AMD is surely targeting. There’s nothing wrong with close to the 6870 performance (it is a lower numerical product) that today beats the original 6870 release MSRP by 20%.
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#25
Isenstaedt
by: _JP_
That being said, I will not replace my 5770 for one of these.
No one changes a card for another with similar performance. that's would be lame. When upgrading I always try to go for over 2x performance.

I was hoping the 7770 to perform close to the 6850 or maybe the 6830 (6790), but it looks like it will perform just like the 5770.
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